JEE Main levelNumerical answerDifficulty 2 of 3o4027
In 2-bromo-2,3-dimethylpentane, count every hydrogen atom attached to a carbon that is directly bonded to the carbon bearing bromine (the beta-hydrogens, i.e. the hydrogens that can be removed in an E2 elimination). Give the total number of such hydrogen atoms (an integer).
Numerical answer type, tolerance 0.5.
Answer: 7
The C-Br carbon (C-2) is bonded to C-1 (CHX3, 3 H), to its own methyl substituent (CHX3, 3 H) and to C-3 (CH, 1 H). Total beta-hydrogens = 3 + 3 + 1 = 7.